Some musings:It depends on your general firm-wide/departmental responsibilities and input levels to your current project. If you're managing a (long term) project or workstream then it may be unavoidable. More preferably (levels of sadism not withstanding), you should be able to manage the expectations of your colleagues and clients such that a holiday email response would not be expected. Personally, I do tend to check emails on holiday, but only to ensure that I have a core ~10 to re-read when I return, rather than ~1000, and I make it clear to my team that they can call my (personal) phone if there is someting they can't do without my input on.I have no issue with a gentle roll on from team members returning from holiday and taking the first half a day cleaning their inboxes and reclimatising, even in the middle of a project. Each to their own. If there is a topic or piece of work where you are indispensible (trust me, this is highly unlikely) then make sure you are contactable especially if there is a lot of £ riding on the work over short timeframes (to be honest, in that sort of situation you'd only be on holiday due to bad management or unavoidable personal circumstances).Finally, depending on your standing within your firm there may be an expectation that you check and respond to your emails to ensure that partner-level colleagues are able to reach you for business development. Bear in mind that it is far better to let them know you are going to be unreachable than to leave them in radio silence.